This is the 11576th most frequent Russian word.
душой
"Душой" means "with (one's) soul" or "wholeheartedly" in English.
Here, 'душой' indicates the essence or lively nature of a person in a group setting.
Он всегда был душой компании.
He was always the soul of the company.
In this sentence, 'душой' reflects the emotional investment or heartfelt sincerity someone applies to their actions.
Она делает всё с душой.
She puts her heart into everything she does.
'Душой' in this instance conveys the inner spirit or emotional state being unaffected or youthful regardless of external conditions.